Reversible ventilation



Now 8, 1927.

L. C. ALBRECHT REVERSIBLE VENTILATION Filed May 20. 1926 2 Sheets-Sheet1 Nov. 3, 1927.

1.. c. ALBRECHT REVERSIBLE VENTILATION 2 Sheets Shee 2 Filed May 20.1926 Patented Nov. 8, 1927.

UNITED STATES PATENT OFFICE.

LOUIS O. ALBRECHT, OF TOLEDO, OHIO, ASSIGNOR TO THE AMERICAN WARMING &V'ENTILATING COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO.

REVERSIBLE VENTILATION.

Application filed Kay 20, 1926. Serial No. 110,435

This invention relates to controllable ventilation mechanism.

i This invention has utility when incorporated in a normally closedlouvre and a reversible draft promotion device, herein shown as anelectric fan.

Referring to the drawings:

Fig. 1 is a front view of the ventilation opening herein in its normalor closed position;

Fig. 2 is a view on an enlar ed scale of the rear of the louvre or ventiation opening of Fig. 1;

Fig. 3 is a side view of the device of Figs. 1, 2;

-' Fig. 4 is a section on the line IV-IV, Fig. 3;

Fig. 5 is a partial section on the line VV, Fig. 4;

Fig. 6 is a view of the switch on theline VI-VI, Fig. 3;

Fig. 7 is a wiring diagram of the control connections for the motor aspulled to OH position;

Fig. 8 is a wirin diagram of the pull after off position, w ich does notgive the starting operation;

Fig. 9 is a view of the next pull from off position which gives thestarting operation for the motor, say in clockwise direction; and

Fig. 10 is a wiring diagram of the control connection as iven anadditional control pull for reversing the direction of the fan. Frame 1is shown as having box extension 2 rearwardly therefrom. This frame 1provides ventilation opening 3 having along its vertical sides bearings4 for rods 5 mounting intermediately their vertical extent, vanes 6having overlapping portions 7 with each other, and as to the terminalvanes abutting flanges 8. These vanes 6 of the multi-vane louvre are sodesigned that the upper portions are heavier. Due to each vane avmg thesame area above and below the pivot rod 5, and the up er portion thereofheavier, the vanes 6 wil assume a horizontal position regardless of thedirection of air travel through the louvre. This is due to the heavierupper portion above the rod 5 offering no more resistance to the aircurrents than the portion below the rod.

On one side from each of the vanes 6, in

ear 9 having pivotal connection 10 with control bar 11 verticallyextending along one side of the box 10 rearwardly of the frame v1. Fromthe upper portion of this bar 11 downwardly extends link 12 as havingpivotal connection 13 with the bar 11 and pivotal connection 14 withforwardly extending arm 15 fixed with rock bar 16 mounted by bearing 17as carried by transverse member 18 in the box extension 2 justrearwardly of the vane 6 and bar 11. This rock bar 16, centrally of theextension 2, has upwardly extending short arm 19 carrying abutment ordisk 20.

The extension 2has inwardly extending rear portions 21 leaving acircular opening 22 in which is mounted ring 23, by bolts 24. This ring23 has inwardly extending flange 24 toward the louvre. This ring 23 hasa series of eyes 25 from which extend inwardly springs 26 to arms 27mounting the motor 28 having shaft 29 mounting disk 30 carrying blades31 having a pitch with slight concavity and flange terminals 32 asstifiening means.

Adjacent the disk 30 and fixed with the shaft 29 is spider 33 carryingpivot bearings 34 from which extend arms 35 carrying fly weights 36.These arms 35 have pivot bearings 37 for forwardly extending links 38connected to ears 39 onsleeve 40 extending beyond the terminus of theshaft 29 in housingspring 4L. This sleeve 40 is a plunger terminating inhead 42 in proximity to the disk 20. p

In operation of the motor 28, as directly connected to the draftpromotion fan means, at once the shaft 29 starts to rotate and theblades 31 effect circulation of air through the opening 22 the flyweights 36, as speed responsive means, move radiall outward effectingcompression! of the spring 41, thereby withdrawing the plunger head 42away from the disk 20, with the result that the vanes 6 are allowed toassume their normall open'position for a free flow of air througtheopening 3 in this ventilation device; At once the motor 28 is stopped,the fly weights 36 move inward and the spring 41 causes the plunger head42 to act upon the disk 20 in swinging simultaneously the series ofvanes 6 into closed position at the opening 3. The vanes are thusnormally held in closing position.

In the control of the device hereunder, there is shown handle 43connected by cord 44 to switch 45 effective for controlling the powerconnections from supply lines 46, 47 to the motor 28. The line 46 isconnected in the switch 45 to terminal 49. Terminals 50,

posed for lower series of terminals 49, 50,.

52, 54. At one off position (Fig. 7) contact 56 engages terminal 55 andhas no terminal contact adjacent 49. The next pull of the cord 44 swin sthe terminal 56 to the positionshown. 1n Fi s. 6, 8. This still leavesthe contact 56 inc ective as to the terminal 49. The succeeding pull ofthe cord 44 shifts.

the contacts 56, 57, to effect the connection as shown in Fig. 9. Thecontact 57 is the only one effective for connecting with the contact 49,and it may be assumed that in this position of the connections, themotor 28 is driven clockwise say for draft inward through the louvre andback through the fan. The next pull of the cord 44 will bring about thewiring connection as shown in Fig. 10 with a reversal of the motor 28.to effect counterclockwise rotation with draft from the motor 28 forcedout throu h the louvre. There is, accordingly, provi ed hereunder asimple automatic control for ventilation say in connection withrestaurants, dining rooms, laundries, or places where there is desiredcontrol of ventilation either inward or outward with insured closure ofthe ventilation opening whenever the forced draft is discontinued. Theoperator is in position definitely to direct the draft, and in theposition, as shown in Fig. 10, if there be desire to stop, there is onlyrequired thesin le pull which will cut out the motor and have the wiringconnections eflfective for stopping as shown in the diagram Fig. 7.

at is claimed and it is desired to secure sure for the openingcomprising self-opening vanes, and a draft promotion device includingmeans movable relatively to the device 1 and closure for permitting theclosure to open only during device operation.

2. A frame providing an opening, a swingweight means movable relativelyto the device and closure for permitting the closure to open only duringdevice operation in either direction.

4. A frame providing an opening, a multivane louvre closure for theopening comprising self-opening vanes, a common control connectionbetween the louvre vanes, a rotary fan, and a fly weight deviceconcentrio with thefan cooperatmg with said control connection fornormall holding the louvre closed and} axially s -iftable away from saidconnectionto allow said'louvre to open. a v I 5. A frame'providmg anopenin ,a multivane louvre closure for the opemng comprisingself-opening vanes, a common con-' normally coacting with said controlconnection for holding the vanes in closed position and movable upon fanrotation to allow said vanes to move to open osition, and a springresisting shiftin of t e plunger for holding said vanes in c osedposition when the fan' is idle.

6. A multi-vane louvre comprisin selfopenin-g vanes, an electric fanadjacent thereto, and meansconcentric with the fan normally holding saidvanes in closed position and axially shiftable on fan operation out ofholding position.

7. A normally self-openinglouvre, an electric fan adjacent thereto, acontrol switch for efiecting two. directions of fan operations, and alouvre controlling device automatically operable when the fan is idlefor effecting louvre closing. a

In witness whereof I afliir my signature.

' LOUIS C. ALBRECHT.

